KR20120007234A - High-strength eutectic aluminum alloy forging process - Google Patents
High-strength eutectic aluminum alloy forging process Download PDFInfo
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- KR20120007234A KR20120007234A KR1020100067883A KR20100067883A KR20120007234A KR 20120007234 A KR20120007234 A KR 20120007234A KR 1020100067883 A KR1020100067883 A KR 1020100067883A KR 20100067883 A KR20100067883 A KR 20100067883A KR 20120007234 A KR20120007234 A KR 20120007234A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/003—Selecting material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
- B22D11/003—Aluminium alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C2202/00—Physical properties
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Abstract
Description
본 발명은 단조용 고강도 공정 알루미늄 합금에 관한 것으로서, 특히 강도가 높은 주철을 단조용 알루미늄 합금으로 대체할 수 있게 하기 위한 단조용 고강도 공정 알루미늄 합금에 관한 것이다.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high strength forged aluminum alloy for forging, and more particularly to a high strength forged aluminum alloy for forging to replace high strength cast iron with an aluminum forging alloy.
일반적으로 유가상승과 환경 규제 등 외부요인에 의해 최근 자동차 업계는 연비개선에 사활을 걸고 있으며, 이를 위해 두 가지 방향이 있는데 하나는 엔진의 연소효율을 높이는 것이고, 다른 하나는 자동차의 무게를 경량화 하는 것이다.In general, due to external factors such as rising oil prices and environmental regulations, the automotive industry has recently begun to improve fuel efficiency.There are two directions for this: one is to increase the combustion efficiency of the engine and the other is to reduce the weight of the car. will be.
이처럼 자동차의 무게 경량화에 중점을 두는 이유는 자동차 1kg 경량화는 연비 0.4%로 이어지기 때문이며, 일부 업계에서는 경량화 방안으로 부품을 삭제하거나, 기능을 통합하고 축소하여 추진하고 있다. The reason for focusing on the weight reduction of automobiles is that the weight reduction of 1kg of automobile leads to 0.4% of fuel efficiency, and some industries are pursuing by eliminating parts, or integrating and reducing functions as a lightweight scheme.
그러나, 이런 방안은 자동차의 안전문제와 직결되며 소비자에게 악영향을 주게 된다. However, this approach is directly related to the safety issues of the car and adversely affects the consumer.
따라서, 경량 금속 소재 적용을 통한 경량화는 부품의 기능을 그대로 유지하면서 자동차 무게를 줄 일수 있기 때문에 자동차 경량화 방안으로 적절하며 소비자에게도 좋은 인상을 줄 수 있다.Therefore, the weight reduction through the application of a light metal material can reduce the weight of the car while maintaining the function of the parts, so it is appropriate as a light weight car and can give a good impression to the consumer.
한편, 엔진 경량화 방안 중 하나는 비중이 무거운 주철(7.2)을 가벼운 알루미늄(2.7)로 대체하는 것으로, 엔진 부품에 많이 사용되는 주철(FC25)을 대체할 단조용 알루미늄에는 A2024(Al-4.5Cu-1.5Mg), A4032(Al-12Si-1Cu-1Ni) 등이 있지만 FC25대비 기계적 강도가 낮아서 아직 주철을 대체한 단조용 알루미늄 합금이 없는 실정이다.
On the other hand, one of the ways to reduce the engine weight is to replace heavy cast iron (7.2) with light aluminum (2.7), and A2024 (Al-4.5Cu-) for forging aluminum to replace cast iron (FC25), which is widely used in engine parts. 1.5Mg) and A4032 (Al-12Si-1Cu-1Ni), but their mechanical strength is lower than that of FC25.
본 발명은 상기의 문제점을 해소하기 위한 단조용 고강도 공정 알루미늄 합금에 관한 것으로서, 특히 강도가 높은 주철을 단조용 알루미늄 합금으로 대체할 수 있게 하기 위한 것을 목적으로 한다.
The present invention relates to a high-strength process aluminum alloy for forging to solve the above problems, and in particular, an object of the present invention is to be able to replace a high-strength cast iron with a forging aluminum alloy.
이러한 본 발명은 알루미늄(Al)을 주성분으로 하고, 실리콘(Si) 9~13중량%, 구리(Cu) 4~5중량%, 마그네슘(Mg) 0.4~0.8중량%, 티타늄(Ti) 0.1~0.3중량% 및 기타 합금원소인 크롬(Cr)과 니켈(Ni)을 첨가하여 합금한 후, 연속주조 및 열처리공정을 거쳐 제조함으로써 달성된다.
The present invention has aluminum (Al) as a main component, silicon (Si) 9-13% by weight, copper (Cu) 4-5% by weight, magnesium (Mg) 0.4-0.8% by weight, titanium (Ti) 0.1-0.3 It is achieved by alloying by adding weight percent and other alloying elements, chromium (Cr) and nickel (Ni), followed by a continuous casting and heat treatment process.
이상과 같은 본 발명은 기계적 강도를 20 ~ 30% 까지 향상시켜 주철을 대체할 수 있게 함으로써 부품의 기능은 그대로 유지하면서 경량화가 가능하게 하여 상품성을 향상시키는데 효과가 있는 발명인 것이다.
The present invention as described above is an invention that is effective in improving the merchandise by enabling the weight reduction while maintaining the function of the parts by improving the mechanical strength up to 20 to 30% to replace the cast iron.
도 1은 본 발명의 단조용 고강도 공정 알루미늄 합금에서 열처리 조건을 도시하는 도면,
도 2의 (a)는 종래의 A4032합금의 미세조직을 나타내는 사진,
도 2의 (b)는 본 발명의 단조용 고강도 공정 알루미늄 합금의 미세조직을 나타내는 사진.1 is a view showing the heat treatment conditions in the forged high strength process aluminum alloy of the present invention,
Figure 2 (a) is a photograph showing the microstructure of the conventional A4032 alloy,
Figure 2 (b) is a photograph showing the microstructure of the forged high strength aluminum alloy of the present invention.
도 1 및 도 2는 본 발명의 단조용 고강도 공정 알루미늄 합금에 관한 것으로, 도 1은 본 발명의 단조용 고강도 공정 알루미늄 합금에서 열처리 조건을 도시하는 도면이며, 도 2는 종래의 A4032합금과 본 발명의 단조용 고강도 공정 알루미늄 합금의 미세조직을 나타내는 사진이다.
1 and 2 are related to the forging high strength aluminum alloy of the present invention, Figure 1 is a view showing the heat treatment conditions in the forging high strength aluminum alloy of the present invention, Figure 2 is a conventional A4032 alloy and the present invention It is a photograph showing the microstructure of the high strength eutectic aluminum alloy for forging.
본 발명의 실시예를 첨부 도면을 참조하여 상세히 설명하면 다음과 같다.An embodiment of the present invention will be described in detail with reference to the accompanying drawings.
본 발명의 단조용 고강도 공정 알루미늄 합금은 알루미늄(Ai)에 실리콘(Si) 및 다량의 구리(Cu)를 첨가하여 금속간 화합물(Al-Si-Cu계)을 형성을 유도하고, 티타늄(Ti)을 첨가하여 Ti 첨가로 결정립을 미세화 시켜 금속간 화합물의 조대화를 막고 구상화 된 금속간 화합물을 형성 및 화합물의 분산을 유도하게 한다.The high strength process aluminum alloy for forging of the present invention induces the formation of an intermetallic compound (Al-Si-Cu based) by adding silicon (Si) and a large amount of copper (Cu) to aluminum (Ai), and titanium (Ti) Ti is added to refine the grains to prevent coarsening of intermetallic compounds, to form spherical intermetallic compounds and to induce dispersion of the compounds.
특히, 공정 합금 내 Cu 함량을 높이고 금속간 화합물을 분산시키기 위해 연속주조 공정을 사용하며, 연속주조 공정을 통해 공정계 알루미늄 합금에 최대 고용된 구리를 빠르게 냉각시켜 금속간 화합물의 양을 늘리고, 또한 열처리공정을 적용하여 석출강화효과에 의한 기계적 강도를 기존 단조용 알루미늄 합금 대비 20~30% 향상시켜 주철(FC25)을 대체하는 단조용 고강도 공정 알루미늄 합금을 개발하여 경량화가 가능하게 되는 것을 그 기술상의 기본 특징으로 한다.
In particular, the continuous casting process is used to increase the Cu content in the process alloy and disperse the intermetallic compound, and the continuous casting process rapidly cools the maximum solid solution of copper in the process aluminum alloy to increase the amount of the intermetallic compound. By applying the heat treatment process, the mechanical strength by the precipitation strengthening effect is improved by 20 ~ 30% compared to the existing forging aluminum alloy, and it is possible to develop a high strength process aluminum alloy for forging that replaces cast iron (FC25). It is a basic feature.
이하 본 발명의 단조용 고강도 공정 알루미늄 합금에 대한 각 구성요소를 첨부한 도면을 참조하여 하나씩 살펴보면 다음과 같다.Hereinafter, the components of the high strength forging aluminum alloy forging of the present invention will be described with reference to the accompanying drawings, one by one.
본 발명은 알루미늄(Al)을 주성분으로 하고, 여기에 실리콘(Si) 9~13중량%, 구리(Cu) 4~5중량%, 마그네슘(Mg) 0.4~0.8중량%, 티타늄(Ti)을 0.1~0.3중량% 및 기타 합금원소인 크롬(Cr)과 니켈(Ni)을 첨가하여 합금한 후, 연속주조 및 열처리 공정을 거쳐 제조된 단조용 고강도 공정 알루미늄 합금을 제공한다.In the present invention, aluminum (Al) is the main component, and silicon (Si) 9 to 13% by weight, copper (Cu) 4 to 5% by weight, magnesium (Mg) 0.4 to 0.8% by weight, and titanium (Ti) 0.1 To provide a high-strength process aluminum alloy for forging prepared by the addition of 0.3% by weight and other alloying elements chromium (Cr) and nickel (Ni), followed by a continuous casting and heat treatment process.
실리콘(Si)은 Al-Si계의 공정점에 가까운 조성이 되면 열간 취성이 제거되고, 유동성과 용접성 및 내식성이 우수하게 되며, 그 양은 9~13중량%를 첨가할 수 있다. When silicon (Si) has a composition close to the Al-Si process point, hot brittleness is removed, and fluidity, weldability, and corrosion resistance are excellent, and the amount may be 9 to 13% by weight.
이때, 실리콘(Si)을 9중량% 미만으로 첨가되면 유동성이 낮아지고 녹는점이 증가해 구리의 고용량이 낮아지게 되며, 13중량%를 초과하여 첨가되면 미세조직상에 조대한 초정 Si입자 생성되어 가공성이 나빠지고, 기계 강도를 저하시키게 되기 때문에 9~13중량%로 유지시키는 것이 좋다.At this time, when the silicon (Si) is added less than 9% by weight, the fluidity is lowered and the melting point is increased to lower the solid solution of copper, and when added in excess of 13% by weight, coarse primary Si particles are formed on the microstructure and workability It is good to keep it at 9 to 13 weight% because it worsens and mechanical strength falls.
금속간화합물 형성을 위한 구리(Cu)는 4~5중량%까지 첨가할 수 있다. Copper (Cu) for forming the intermetallic compound may be added up to 4 to 5% by weight.
이때, 구리(Cu)를 4% 미만으로 첨가되면 Cu계 정출상이 충분히 형성되지 않고, 석출상만 형성되며, 5중량%를 초과하여 첨가하게 되면 금속간화합물의 입자가 커지게 되는 조대화 문제가 발생한다.At this time, when Cu (Cu) is added less than 4%, Cu-based crystallized phase is not sufficiently formed, only the precipitated phase is formed, and when added in excess of 5% by weight, coarsening problem that the particles of the intermetallic compound becomes large Occurs.
마그네슘(Mg)은 0.4~0.8중량% 첨가되어 Mg2Si의 석출경화에 의해서 강도를 향상시키는 효과가 있으며, 상기 마그네슘(Mg)을 0.8중량%를 초과하여 첨가하게 되면 연신률 감소 및 용탕이 쉽게 산화되게 된다.Magnesium (Mg) is added to 0.4 ~ 0.8% by weight to increase the strength by precipitation hardening of Mg 2 Si, and when the magnesium (Mg) is added in excess of 0.8% by weight, elongation is reduced and the melt is easily oxidized Will be.
티타늄(Ti)은 0.1~0.3중량%가 첨가되는데, Ti 첨가로 결정립을 미세화 시켜 금속간 화합물의 조대화를 막고 구상화 된 금속간 화합물을 형성 및 화합물의 분산을 유도하게 된다. Titanium (Ti) is added in an amount of 0.1 to 0.3% by weight. The addition of Ti refines the grains to prevent coarsening of the intermetallic compound, forms a spheroidized intermetallic compound, and induces dispersion of the compound.
이때, 티타늄(Ti)을 0.3중량%를 초과하여 첨가하게 되면 결정립 강화(Grain Refinement)가 발생해 주조가 어렵게 될 수 있다.In this case, when titanium (Ti) is added in excess of 0.3% by weight, grain refinement may occur and casting may be difficult.
이처럼, 알루미늄(Al)을 주성분으로 하여 실리콘(Si) 9~13중량%, 구리(Cu) 4~5중량%, 마그네슘(Mg) 0.4~0.8중량%, 티타늄(Ti)을 0.1~0.3중량% 및 기타 합금원소인 크롬(Cr)과 니켈(Ni)을 첨가하여 합금한 다음에는, 연속주조 및 열처리공정을 거치게 된다.As such, 9 to 13% by weight of silicon (Si), 4 to 5% by weight of copper (Cu), 0.4 to 0.8% by weight of magnesium (Mg), and 0.1 to 0.3% by weight of titanium (Ti) based on aluminum (Al) And alloying with chromium (Cr) and nickel (Ni), which are other alloying elements, are subjected to continuous casting and heat treatment.
여기서, 도 1은 본 발명의 단조용 고강도 공정 알루미늄 합금에서 열처리공정을 도시하는 것으로, 도 1에 도시된 바와 같이, 용체화 처리 단계를 통해 충분히 열을 가한 다음 ??칭(Quenching, 수냉) 단계를 통해 저온으로 급랭시키고, 최종적으로 시효 처리 단계를 통해 재료를 균질하게 만들게 되는 것이다.Here, FIG. 1 illustrates a heat treatment process in the high strength aluminum alloy for forging of the present invention, and as shown in FIG. 1, sufficient heat is applied through a solution treatment step, followed by a quenching (water cooling) step. To quench to low temperature, and finally to make the material homogeneous through the aging treatment step.
이때, 도 2의 (a)는 종래의 A4032합금의 미세조직을 나타내는 사진이며, 도 2의 (b)는 본 발명의 단조용 고강도 공정 알루미늄 합금의 미세조직을 나타내는 사진으로, 도 2를 상호 비교하여 살펴보면 종래의 합금에 비해 본 발명의 합금이 미세한 금속화합물이 고르게 생성됨을 확인할 수 있으며, 금속간 화합물의 크기뿐만 아니라 형상 측면에서도 침상에서 구상화되어 기계물성 향상에 도움이 됨을 알 수 있다. At this time, Figure 2 (a) is a photograph showing the microstructure of the conventional A4032 alloy, Figure 2 (b) is a photograph showing the microstructure of the high-strength eutectic aluminum alloy for forging of the present invention, Figure 2 is compared with each other Looking at it, it can be seen that the alloy of the present invention is evenly produced as a fine metal compound compared to the conventional alloy, it can be seen that it is spheroidized in the bed in terms of shape as well as the size of the intermetallic compound to help improve the mechanical properties.
한편, 종래의 알루미늄 단조합금인 A4032합금과 본 발명의 단조용 고강도 공정 알루미늄 합금을 이용하여 화학성분 분석 및 기계강도 평가 결과는 다음 표 1에 나타낸 바와 같다.On the other hand, using the conventional aluminum forging alloy A4032 alloy and the high strength process aluminum alloy for forging of the present invention, the results of chemical component analysis and mechanical strength evaluation are shown in Table 1 below.
(A4032합금)Comparative example
(A4032 alloy)
(본 발명)Example
(Invention)
종래에는 알루미늄(Al)을 주성분으로 하고, 여기에 실리콘(Si) 9.2중량%, 구리(Cu) 1.1중량%, 마그네슘(Mg) 1.5중량%, 티타늄(Ti) 0.01중량%, 니켈(Ni) 1.7중량%가 첨가되어 합금함으로써, 항복강도는 320Mpa, 인장강도는 350Mpa의 평가 결과를 나타냄을 알 수 있다.Conventionally, aluminum (Al) is used as a main component, and 9.2% by weight of silicon (Si), 1.1% by weight of copper (Cu), 1.5% by weight of magnesium (Mg), 0.01% by weight of titanium (Ti), and nickel (Ni) 1.7 By adding the alloy by weight%, it can be seen that the yield strength is 320 Mpa, the tensile strength is 350Mpa evaluation results.
그러나, 본 발명의 실시예에 따른 단조용 고강도 공정 알루미늄 합금은 알루미늄(Al)을 주성분으로 하고, 여기에 실리콘(Si) 12.6중량%, 구리(Cu) 4.7중량%, 마그네슘(Mg) 0.6중량%, 티타늄(Ti) 0.24중량%, 크롬(Cr) 0.04중량%, 니켈(Ni) 0.01중량%가 첨가되어, 연속주조 후 열처리한 결과의 합금을 제조하여 항복강도는 381Mpa, 인장강도는 440Mpa의 평가 결과를 나타내어 종래보다 기계강도가 우수해졌음을 알 수 있다.However, the high strength process aluminum alloy for forging according to the embodiment of the present invention has aluminum (Al) as a main component, 12.6% by weight of silicon (Si), 4.7% by weight of copper (Cu), 0.6% by weight of magnesium (Mg). , 0.24% by weight of titanium (Ti), 0.04% by weight of chromium (Cr) and 0.01% by weight of nickel (Ni) were prepared, and an alloy obtained as a result of heat treatment after continuous casting was produced. The yield strength was 381Mpa and the tensile strength was 440Mpa. The results show that mechanical strength is superior to that of the prior art.
또한, 종래의 알루미늄 단조합금인 A4032합금과 본 발명의 단조용 고강도 공정 알루미늄 합금에 열처리가공을 적용한 다음 기계강도 변화를 장비로 측정하였으며, 그 결과는 표 2에 나타낸 바와 같다.In addition, the heat treatment was applied to the conventional aluminum forging alloy A4032 alloy and the high strength process aluminum alloy for forging of the present invention and then measured the mechanical strength change by the equipment, the results are shown in Table 2.
표 2에서 볼 수 있듯이, 미세조직의 변화에 의해, 종래의 알루미늄 단조합금인 A4032합금에 비해 본 발명의 실시예에 따른 단조용 고강도 공정 알루미늄 합금의 항복강도가 22%, 인장강도가 27% 향상된 것을 확인할 수 있었으며, 따라서 종래 보다 합금 대비 고강도 소재를 얻을 수 있음을 확인할 수 있었다.
As can be seen from Table 2, due to the microstructure change, the yield strength of the high strength process aluminum alloy for forging according to the embodiment of the present invention is increased by 22% and tensile strength by 27%, compared to the conventional A4032 alloy, which is a conventional aluminum forging alloy. It was confirmed that, thus, it was confirmed that a high-strength material can be obtained compared to the conventional alloy.
상기와 같이 구성된 본 발명의 단조용 고강도 공정 알루미늄 합금은 알루미늄(Al)을 주성분으로 하고, 실리콘(Si) 9~13중량%, 구리(Cu) 4~5중량%, 마그네슘(Mg) 0.4~0.8중량%, 티타늄(Ti) 0.1~0.3중량% 및 기타 합금원소인 크롬(Cr)과 니켈(Ni)을 첨가하여 합금한 후, 연속주조 및 열처리공정을 거쳐 제조되어 기계적 강도를 20 ~ 30% 까지 향상시켜 주철을 대체할 수 있게 함으로써 부품의 기능은 그대로 유지하면서 경량화가 가능하게 하여 상품성을 향상시키는데 탁월한 이점을 가진 발명인 것이다.
The high strength process aluminum alloy for forging of the present invention configured as described above has aluminum (Al) as a main component, and 9 to 13% by weight of silicon (Si), 4 to 5% by weight of copper (Cu), and magnesium (Mg) 0.4 to 0.8 It is manufactured by adding by weight%, 0.1 ~ 0.3% by weight of titanium (Ti) and other alloying elements, chromium (Cr) and nickel (Ni), and then through continuous casting and heat treatment process. It is an invention that has an excellent advantage to improve the commerciality by enabling the weight can be reduced while maintaining the function of the parts by improving the replacement of cast iron.
이상과 같이, 본 발명은 비록 한정된 실시예와 도면에 의해 설명되었으나, 본 발명은 이것에 의해 한정되지 않으며 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 의해 본 발명의 기술사상과 아래에 기재될 특허청구범위 내에서 다양한 수정 및 변형이 가능함은 물론이다.As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is intended by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of the claims to be described.
Claims (2)
Mainly composed of aluminum (Al), 9 to 13% by weight of silicon (Si), 4 to 5% by weight of copper (Cu), 0.4 to 0.8% by weight of magnesium (Mg), 0.1 to 0.3% by weight of titanium (Ti) and others A high-strength process aluminum alloy for forging, characterized in that the alloy is added by alloying with chromium (Cr) and nickel (Ni), followed by a continuous casting and heat treatment process.
상기 열처리공정은 용체화 처리 단계, 수냉 단계 및 시효 처리 단계로 이루어지는 것을 특징으로 하는 단조용 고강도 공정 알루미늄 합금.The method of claim 1,
The heat treatment process is forging high strength aluminum alloy forging, characterized in that consisting of the solution treatment step, water cooling step and aging treatment step.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107234196A (en) * | 2017-05-26 | 2017-10-10 | 西安赛特思迈钛业有限公司 | The atomic ratio Ti-Ni alloy large-sized casting ingot forging method such as one kind |
| CN111575553A (en) * | 2020-06-03 | 2020-08-25 | 南通鸿劲金属铝业有限公司 | Preparation process of high-thermal-conductivity eutectic aluminum alloy material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107234196A (en) * | 2017-05-26 | 2017-10-10 | 西安赛特思迈钛业有限公司 | The atomic ratio Ti-Ni alloy large-sized casting ingot forging method such as one kind |
| CN111575553A (en) * | 2020-06-03 | 2020-08-25 | 南通鸿劲金属铝业有限公司 | Preparation process of high-thermal-conductivity eutectic aluminum alloy material |
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